video recording shutting off while recording within 5 seconds

Im using the canon 5D with the Marshal Electronics v-lcd-50-hdmi monitor. all before it was workin fine, now all of a sudden wen i try to record video with the monitor connected it responds as if my CF card is too slow by shutting down the recording within 5 seconds every time. if i disconnect the monitor it works fine. it was working with the monitor all along up until yesterday can anyone please help. and yes i do see that lil icon on the side that indicates that its about to shut down wen the lights hit the top